Drilling-machine



(No Model.)

F. W. LUSGOMB & D. A. COREY. DRILLING MACHINE Patented Sept. 10, 1889.

' UNITED STATES PATENT OFFICE.

FREDERICK w. LUSCOMBTAND DAVID A. COREY, OF NEw BEDEoRD,

' MASSACHUSETTS.

DRlLLlNG.- MACH'INE.

$IPECI FIGATION forming part of Letters Patent No. 410,762, dated September 10,1889.

Application filed July 3, 1889.

To all whom it may concern.-

Be it known that We, FREDERICK W. LUS- COMB and DAVID A. COREY, citizens of the United States, residing at New Bedford, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a specification.

Our invention relates to drilling-machines; and its object is to provide means whereby the drill may be fed .to or removed from the work by means of the operators foot, and thus leave both of his hands free to hold and manage his work; and it consists in providing the shaft of the feed-pinion of a drillingmachine with a toothed wheel rigidlyfixed to said shaft and provided with a housing pivoted on said shaft, having two spring-detents to engage with said toothed wheel at the will of the operator, and having a projecting arm and means to connect the same with a foot-lever, whereby the said toothed wheel, shaft, and feed-pinion may be rotated by depressing said foot-lever.

In the accompanying drawings, Figure 1 is a side elevation of a drilling-machine provided Wltll'Olll invention. Fig. 2 is a View of the toothed wheel within its housing, which is provided with Spring-detents and a projecting arm. Fig. 3 is a front View of a portion of the spindle of the drilling-machine and the bracket which carries it.

In the drawings, A represents an upright drilling machine of ordinary construction with the exception of our improvement.

a is the shaft, on which is mounted the ordinary feed-pinion, which engages the rack 10 on the spindle s.

b is the housing, which incloses the toothed wheel which we supply to the shaft a. and which is pivoted on said shaft. 6 is an extension of said housing, in which are located the spring-detents d d.

c is an arm projecting from the housing I) in the same plane thereof, and which is connected with the arm h by the bar g. The arms h and 1' project from the same sleeve Serial No. 316,448. (No model.)

The foot-lever 0 is pivoted bethe weight 19, which is adjustable on said lever.

The arrangement of the toothed wheel within the housing I), together with the con-.

struction and operation of the diiferent parts, is fully shown in Fig. 2, in which 0' is the toothed wheel, made fastto the shaft a.

d d are the spring-detents, having chiselshaped points taking into the teeth of the wheel r. the pins 25 t, which, when the detents engage the wheel 7', drop into the slots :rby means of the springs 11 o. a

The operation of the device is as follows: Then it is desired to drill a number of short holes, both detents are allowed to engage with the toothed wheel 0, which causes the motion of the Spindle s to be coincident with that of the foot-lever 0, thus enabling the operator to feed the drill to and remove it from the work by means of the foot-lever, while both his hands are at liberty to hold and manage his-work. hen it is desired to drill a hole deeper than the extent of one stroke of the foot-lever, the rear detent is disengaged from the toothed wheel 4 and turned so that the pin t will rest on the top of the extension 6 and there be heldin place. The foot-lever 0 is then depressed to the limit of its stroke, thus feeding the drill that distance into the work. The foot-lever is then allowed to rise, and while it is so doing the chisel-shaped point of the detent allows it to slip over the teeth of the wheel 0" until, when the lever is moved in the opposite direction, the point catches and the spindle s and drill aremoved coincidently with the foot-lever.

WVhat we claim is In combination with the feed-pinion and The detents d d are provided with shaft of a drilling-niaehine, a toothed wheel ehine is fed toward or from the work by the rigidly mounted on said shaft and having foot of the operator.

a housing pivoted on said shaft, and pro- 1 T vided with two spring-detents to engage Z X G %F{; 5 with said toothed wheel at the will of the operator, and having a projecting arm con- Witnesses:

nected by suitable mechanism with a foot- II. \V. MASON,

lever, whereby the spindle of the drilling-ina- J. L. GILLINGHAM. 

